I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Download Presentation

Intoruduction

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

Browsers allow a user to adapt their caching policy by specifyingthe size of cache, whether a cached document should always be checked for consistency, or only once per session

But, the user can not influence other caching parameters, how long a document may remain in the cache, or which document should be removed when the cache fills up. Impossible to make caching decisions based on the content of document.

Problem : theoretical point of view the optimal way to do routing in collect complete information about load on all machines and lines and then run a graph theory algorithm to compute all the optimal route.

Virtual machine : To an application, it appears as If it has it own resources, and that there may be several applications executing on the same system at the same time, each with their own set of resources

An important is to support for multiple processors having access to a shared memory.

Data have to be protected against concurrent access to guarantee consistency but can’t easily handle multiple CPUs since they have been designed as monolithic programs that can be executed only with a single thread of control => need redesigning and reimplementing the entire kernel